Eraser.



Patentd M y I3, |902.

E. SWENSS-UN.

. E B A S E R. (Appumiog me@ Feb. 1, 1902.)

- (No Nudel.)

. x. .u InlM llllllllllllll Y UNrTnD STATES PATENT Orrrcn.

ERIC S\VENSSON, OF CHICAGO, ILLINOIS.

ERASER.

SPECIFICATION forming part of Letters Patent No. 699,934, dated May 13, 1902.

Application filed February 17,'1902. Serial No. 94,555. (No model.)

To all whom may concern/r nois, have invented certain new and useful Improvements in Erasers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in which corresponding letters ot' reference in the different gures indicate like parts.

The object of my inventionis to provide an eraser for the use of draftsmen, bookkeepers, type-writers, and'others having occasion to erase ink or pencil marks, which device may be so constructed as to enable its work to be done with speed and accuracy, while the soiling of the surface froni which the erasure is made may be avoided, all of which is herein- Fig. 3 is an enlarged central longitudinal sec-V tional view in detail of a portion of the tubular handle, and Fig..4 is an edge View in d'etail of the eraser and hub. upon which it is mounted.

Referring to the drawings, a represents a hollow metal tube forming the handle of my improved eraser, upon one end of which is brazed or otherwise formed a bifurcated eX- tension b, between the branches of which is interposed a hub c, whichis journaled in a suitable bearing preferably formed by inserting a pin CZ through the axis of said hub and through bores in the ends of said branches.

Mounted upon the hub d midway between its ends is an erasing-disk@ of any suitable erasing or abrading material, such as indiarubber or rubber and other composition employed for erasing purposes.

Upon the hub c, and preferably upon opposite sides of the disk e, are formed grooved pulleys ff, upon which a cord g is wound and extended into the tube 0.,'as shown in Fig. 2, where the ends are attached at It to one end of a spiral spring t', the other end of said spring bein g attached to a screw-plugj, which is tapped into the end of the tube a. The

ends of said cord are so attached to the spring as to cause the parts to be separated from but parallel with each other, so as not to rub against the disk e when the latter is rotated. VI prefer to attach a metal clip 7i; to the cord near the outer end or loop, which clip serves to separate the parts thereof, as shown, and

Ito form a stop for the purpose hereinafter stated. To the outer end or loop of said cord `I attach a handle Z, consisting, preferably, of

a wire bent in the manner shown in Fig. l.

The operation of my improved device is as follows: The spring t, being under constant Ct is grasped by the user in one hand and the periphery of the disk held against the surface .to be erased.V The handle Z is then grasped by-the other hand and the cord drawn out to its Vfull length, which movement, by the action of the cord upon the pulleys f, serves to rapidly rotate the disk. When the limit of outward movementis reached,the strain upon the cord is relaxed and the recoil of the spring Aacts to reverse the movement of the cords, thereby causing the disk to rotate in an opposite direction. This reciprocating action of the hand causes the disk to rotate back and'forth with considerable speed, while at the same time the position of the disk may be changed by the user until the work is iinished.

My improved device enables erasing to be done with speed and neatness and is especially applicable to draftsmens use. In order torender said device more effectual for said purpose, I prefer to attach to the opposite end of the handle from'that upon which the disk is mounted a brush m, the bristles ot' which are preferably secured in a bore formed inthe plug J. The advantage of this appliance is obvious.

It is manifest that a' rubber cord or any well-known elastic material may be substituted for the spring fi, and when I userthe word spring in the claims I mean any suitable elastic material, nor do I confine myself to the location of the spring, although Iprefer to use it within a tubular handle.

Having thus described my invention, I claiml. An eraserin which is combined ahandle,

IOO

a revoluble erasing-disk mounted in a bearingr ab one end thereof, lthe aXis of which is arrangedv ab right'J angles to that of said handle, a spring secured to the opposite end of said handle, a pulley upon the axis of said disk and a cord brained over said pulley, one end of which is attached to said spring, and the other of which is free to be grasped by the hand.

2. An eraserin Whichis combined atubular handle, a revoluble erasing-disk mounted| lhereon, a spiral spring Within said handle, i

cords having their ends attached to said spring said cords being trained over pulleys upon opposite sides of said disk, and a handle attached to Inhe opposite ends of said cords, substantially as and for the purpose specified.

In testimony whereof I have vsigned this specification, in the presence of two subscribing witnesses,tl1s 15th day of February,l902.

ERIC SWENSSON. \Vitnesses:

D. H. FLETCHER, CARRIE E. JORDAN. 

